Ehibit 10.4

                                 PROMISSORY NOTE

$66,000.00                                                    Date: June 19,2005

For value received, the undersigned Sierra Norte LLC (the "Borrower"), at 5111
Juan Tabo Blvd. N.E., Albuquerque,, New Mexico 87111, promises to pay to the
order of Karen Y. Duran, (the "Lender"), at 12512 Modesto Ave. N.E.,
Albuquerque,, New Mexico 87122, (or at such other place as the Lender may
designate in writing) the sum of $66,000.00 with interest from June 19, 2005, on
the unpaid principal at the rate of 8.50% per annum.

Unpaid principal after the Due Date shown below shall accrue interest at a rate
of 12.00% annually until paid.

The unpaid principal and accrued interest shall be payable in full on May
25,2006 (the "Due Date").

All payments on this Note shall be applied first in payment of accrued interest
and any remainder in payment of principal.

If any installment is not paid when due, the remaining unpaid balance and
accrued interest shall become due immediately at the option of the Lender.

The Borrower reserves the right to prepay this Note (in whole or in part) prior
to the due date with no prepayment penalty.

If any payment obligation under this Note is not paid when due, the Borrower
promises to pay all costs of collection, including reasonable attorney fees,
whether or not a lawsuit is commenced as part of the collection process.

If any of the following events of default occur, this Note and any other
obligations of the Borrower to the Lender, shall become due immediately, without
demand or notice:

     1)   the failure of the Borrower to pay the principal and any accrued
          interest in full on or before the Due Date;

     2)   the death of the Borrower(s);

     3)   the filing of bankruptcy proceedings involving the Borrower as a
          Debtor;

     4)   the application for appointment of a receiver for the Borrower;

     5)   the making of a general assignment for the benefit of the Borrower's
          creditors;

     6)   the insolvency of the Borrower;

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     7)   the misrepresentation by the Borrower to the Lender for the purpose of
          obtaining or extending credit.

In addition, the Borrower shall be in default if there is a sale, transfer,
assignment, or any other disposition of any assets pledged as security for the
payment of this Note, or if there is a default in any security agreement which
secures this Note.

If any one or more of the provisions of this Note are determined to be
unenforceable, in whole or in part, for any reason, the remaining provisions
shall remain fully operative.

All payments of principal and interest on this Note shall be paid in the legal
currency of the United States. Borrower waives presentment for payment, protest,
and notice of protest and nonpayment of this Note.

No renewal or extension of this Note, delay in enforcing any right of the Lender
under this Note, or assignment by Lender of this Note shall affect the liability
of the Borrower. All rights of the Lender under this Note are cumulative and may
be exercised concurrently or consecutively at the Lender's option.

This Note shall be construed in accordance with the laws of the State of New
Mexico.

Signed this 15th day of June, 2005.

Borrower:

Sierra Norte, LLC


By: /s/ Fred M. Montano
    --------------------------------
    Fred M. Montano


ASSIGNMENT

[ONLY COMPLETE THE FOLLOWING INFORMATION TO ASSIGN PAYMENTS TO A NEW PARTY.]

For value received, the above Note is assigned and transferred to ____________ ,

("Assignee") of _________________________________________.
                     (City)(Sate/province)

__________________________
(Country)


Dated:  June 15, 2005
       -----------------------------


By: /s/ Karen Y. Duran
    ----------------------------------------
    Karen Y. Duran